开关直流稳压电源

2013年全国大学生电子设计大赛报告

【专科组】

直流稳压电源及漏电保护装置（L题）

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摘要：在科技日新月异的现代，随着电子技术，自动化技术，IC技术等的高速发展，出现了各种各样的电子设备，如计算机、电视机、通信设备、工业控制设备、服务器、路由器和医疗仪器等。在电子设备内部，各种各样的IC电子电路

和执行装置都需要电源。电子设备由于要完成许多先进、高级的功能，对供电电源的精度、稳定性、动态想响应能力及其他很多指标都有非常高的要求，而电网直接提供的交流电或电池直接提供的直流电是随环境、时间或负载变化的，它们

不能直接成为电子设备所需的内部电源。

将电网或电池提供的一次电能转换为符合电子设备要求的二次电能，这样的设备便是电源。电源是一切电子设备的心脏，是所有电子设备的动力，没有电源，电子设备就不能工作。

关键字：电子设备交流电二次电能电源

Abstract: in moder n scie nee and tech no logy cha nge rap idly, along with the devel opment of electr onic tech no logy, automati on tech no logy, the rapid devel opment of IC tech no logy, the electr onic devices of all kin ds, such as compu ter, televisi on, com muni cati ons equipmen t, in dustrial con trol equipment, server, router and medical instruments etc. In the electronic equipmen t, IC electr onic circuit and executor of all kinds n eed po wer supply. Electronic equipment due to be completed many advaneed, advaneed functions, accuracy, stability, dynamic power supply to response

ability

and many other in dicators have a very high dema nd, while the DC AC po wer directly or directly to the battery is provided with the environment, time or load cha nges, they can not be directly into an internal po wer supply electro nic equipment required.

The po wer or battery p rovides an electrical en ergy is con verted to meet the requirements of electronic device two powers, such equipment is

power. The power electronic equipment is all heart, is the driving force,

all electronic devices without power supply, electronic equipment cannot work.

Keywords: electronic equipment AC power supply two

目录

1.系统设计..........................

1.1设计要求.........................

1.2.总体方案设计....................

1.2.1设计思路 ...................

1.2.2控制系统 ...................

1.2.3方案论证与比较 .............

2.单元模块设计 .....................

2.1 TL494构成的PWM控制器电路的设计

2.2单片机检测电路的设计.............

2.2.1单片机显示电路的设计 ......

2.3电压、电流检测电路的设计.........

3.系统调试 .........................

4.系统测试 .........................

4.1测试使用的仪器...................

4.2指标测试和测试结果...............

4.2.1输出电压电流的测试 .........

4.2.2电压调整率的测试 ...........

4.4.3负载调整率的测试 ...........

5.设计总结 ......................... 参考文献：.......................... 附录................................

1 1 1 1

2 2 4 4 6 6 8 9 10 10 10

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附录1:元器件清单....................

附录2:系统电路图....................

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